Each person has diffrent opinions, after you did the research buy the coin you are willing to buy again next month and that you want to help grow the project, and have the patiance to wait for it 6 month to grow or maybe 1 year. Could also be tomorow  but start with the idea it could take 1 year.

Always pay atention to network fees. Depends what token you have it can cost alot to move it around. For 100$ of anything i would even say it is safe enough on a exchange.